radiator cap AUDI S7 2012 Owners Manual

Instrument s and warnin g/indic ator ligh ts 15
believe that it is safe to do so, proceed
immediately at low speed to the nearest
authorized Audi dealer or qualified repair
facility and have the brake system i n­
spected .
- Always keep in m ind that after several
brake applicat ions, you will need greater
pressure on the brake peda l to stop your
vehicle . Do not re ly on stra ined brakes to
re spond w ith maxim um stopp ing power
in cri tic al situa tions. You mus t all ow for
increased bra king distances. The extra
distance used up by fading brakes could
lead to an accident.
PARK /(®) Electromechanical parking
brake
Th e warning/indicator light monitors th e
electrome chanical parking broke.
If the indicator light- (USA models) ti
(Canada models) turns on, the parking brake
was set . If the parking brake is set when the
ignit ion is off, th@ indicator light turns off af­
t er abou t 20 seconds.
The warning/indicator light will go out when
the park ing brake is released.
- (USA model s) /. (Canada model s)
Caution: Vehicle parked too steep
If the indi cator lig ht blinks and the message
appears, t here is no t eno ugh braking powe r to
keep the vehi cle from ro lling . The brakes have
overheated. The vehicle could ro ll away even
on a small incline .
Pres s brake p ed al to r elea se parkin g brake
To release the parking brake, press the b rake
pedal and p ress the button~ or start driving
with start ing ass ist a t the same time
r=.> page 75.
Pleas e release parking brake
To release the parking brake man ua lly, pre ss
t he brake pedal and press the button ~ at the
same time . The parking brake on ly release au ­
tomatically if the dr iver 's safety belt is fas­
tened.
ll'J Parking brake!
If the ll'J indicato r light turns on and this
mess age appears , the re is a parki ng b ra ke
malfu nction . Drive to your au thori zed A udi
dealer or qualified workshop immediately to
hav e the malfunctio n corrected .
-L Engine cooling system malfunction
A malfunction in the engine cooling system
must be repaired as soon as possible.
• Switch off engine and che ck coolant level
If the indica tor l ight turns on and the mes­
sage appears, the coolant temperature is too high or the coolant leve l is too low.
.,. Pull off the road .
.,. Stop the vehicle .
.,. Tu rn off th e engine.
.,. Check coolant level¢
page 223 .
.,. Add coo lant if necessary r=.> page 224.
.,. Con tinue driv ing on ly afte r the engine cool­
ant warning/indicator ligh t goes out .
.,. Contact yo ur authorize d Au di d ealer for as-
s istance if necessary.
I f the engine coo lant level is correct, then the
radiator fan may be the cause of the malfunc­
tion .
• Coolant temperature too high! Pl ease let
engine run with vehicle stationary
If the indicator light turns on and the mes­
sage appea rs in trailer mode*, let the eng ine
run a t idl e for a few minutes to cool down .
A WARNING
- If your vehicle should brea k down for
mechanical or other reasons, park at a
safe distance from moving traffic, tu rn
off the eng ine and turn on the hazard
warn ing lights
r=.> page 42, Emergency
flasher .
-
-Never open the hood if you see or hear
steam or coola nt escaping from the en­
g ine compartment -you r isk be ing scald­
ed . Wait unt il you ca n no longer see o r
hea r steam o r coolant escap ing . ..,.

216 Checking and filling
Checking and filling Engine hood
Releasing the engine hood
The engine hood is released from inside the
vehicle .
Fig. 167 Driver foo twell: release lever
Fig. 168 Rocker switch un der the hood
Make sure the wiper arms are not raised up
from the windshield. Otherwise the paint
could be damaged.
.,. Pull the lever under the instrument panel in
the direction of the arrow
~ fig. 167.
.,. Raise the hood slightly~.&_ .
... Press the rocker switch under the hood up­
ward
~ fig. 168. This releases the catch.
... Open the hood.
&_ WARNING
Hot engine coolant can burn you.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine compartment . Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood .
' Working in the engine compartment
Be especially careful whenever you work in
the engine compartment.
Whenever you must perform any work in the
engine compartment, for example checking
and filling different fluids, there is a risk of injury, burns and accidents. To prevent per­
sonal injury always observe the following
WARNINGS. The engine compartment of any
vehicle is a hazardous area
~ ,&. .
/n.. WARNING
To help avoid injury, before you check any­
thing under the hood:
- Turn off the engine.
- Switch off the ignition .
- Apply the parking brake.
- Move selector lever to "P" (Park) .
- Always let the engine cool down. Hot
components will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment. Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood.
- Keep children away from the engine com­
partment.
- Never spill fluids on hot engine compo­
nents . They can cause a fire .
- Never touch the radiator fan. The auxili­
ary electric fan is temperature controlled
and can switch on suddenly .
- Never open the coolant reservoir cap
when the engine is still warm . The cool­
ant system is pressurized and hot cool­
ant could spray out.
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir.
- If work on the fuel system or the electri­
cal system is necessary:
- Always disconnect the battery.

224 Check ing and filling
cold engine, the coo lant level should be be ­
tween the "min" and "max" markings. When
the engine is warm, the level may be s light ly
above the "max" marking.
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
c:> page 218.
To obtain an accurate reading, the engine must be switched
off.
The expansion tank in you r vehicle is equipped
with an e lectric coolant level sensor.
When the coolant level is too low, the warning light in the Auto-Check System
c:> page 15 will
i l lum ina te unti l you add coolant and the level
has been restored to normal. Even though
there is an electric coolant level senso r, we
still recommend you check the coolant leve l
from time to time.
Coolant los s
Coolant loss may indicate a leak in the cool ing
system. In the event of coolant loss, the cool ­
ing system should be inspected immediately
by your authorized Audi dealer. It is not
enough merely to add coolant.
I n a
sea led system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheat ing.
A WARNING
The cooling system is under pressure and
can get very hot. Reduce the risk of scald­
ing from hot coolant by following these
steps.
- Turn
off the engine and allow it to cool
down.
- Protect yo ur face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag.
- Turn the cap slowly and very carefully in
a counter-clockwise direction wh ile ap­
plying light, downward pressure on the
top of the cap.
- To avoid be ing burned, do not spill ant i­
freeze or coolant on the exhaust system
'
or hot engine parts. Under certain cond i­
tions, the ethylene glycol in engine coo l­
ant can catch fire.
(D Note
Do not add any type of radiator leak sea l­
ant to your vehicle's engine coolant. Add­ i ng radiator repa ir fl uid may adverse ly af­
fect the funct ion and performance of your
cooling system and could result in damage
not covered by your New Veh icle L imited
War ranty.
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the eng ine com­
partment,
always read and heed all W ARN­
INGS c:> A in Working in the engine compart­
ment on page 216 .
.. Turn off the engine.
.. Let the engine cool down.
.. Place a thick rag over the coolant expansion
tank
c:> page 223, fig . 172 and carefully
twist the cap co unte r-clockwise c:> .&, .
.,. Add coolant .
.,. Twist the cap on aga in
tightly.
Replacement engine coo lant must conform to
exact spec ificat ions
c:> page 223, Coolant.
E ven in a n emerge ncy, if coolant add i-
t ive G12 ++, G 12+ or G12 is not available, do
not use a d iffe rent addit ive. Use plain water
instead unti l you can get the correct additive
and can restore the correct ratio . This shou ld
be done as soon as possible.
If you have lost a considerab le amount o f
coolant, then you sho uld add cold antifreeze
and co ld water on ly w hen the engine is cold.
Always use
new engine coo la nt whe n refilling.
Do not fill coola nt above the "MAX" mark . Ex­
cess coola nt will be fo rced out through the
pressure relief valve in the cap w hen the e n-
gine becomes hot. .,.

_& WARNING
-The cooling system is under pressure and
can get very hot. Reduce the risk of
scald ing from hot coolant by following
these steps.
- Turn
off the engine and a llow itto cool
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering
the cap with a large, thick rag.
- Turn the cap slow ly and very carefully
in a counter-clockwise direction while
applying light, downward pressure on
the top of the cap.
- To avoid being burned, do not spi ll an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts . Under certain
conditions, the ethylene glycol in en­
g ine coolant can catch fire .
- Antifreeze is poisonous. Always store an­
tifreeze in its or iginal containe r and we ll
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clearly marked "poison".
(D Note
- Coolant pollutes the env ironment and
could cause an engine fire. Excess cool­
ant will be forced out through the pres­
su re relief valve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the cor rect ratio between water
and antifreeze ¢
page 223 must be re­
stored as soon as possib le.
@ For the sake of the environment
Drained coolant should not be reused . A l­
ways dispose of used coolant while obse rv­
ing all environmental reg ulations.
Checkin g and fillin g 225
Radiator fan
The radiator fan switches on automatically by
itself.
An auxiliary electric radiator fan switches on
and
off depending on coolant temperature
and other vehicle operat ing cond it ions .
After you switch the engine
off, the auxiliary
fan can continue running for up to 10 minutes
- even with the ignition
off. It can even switch
on again later by itself ¢&. , if
- the temperature of the engine coo lant rises
due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment heats up because
the vehicle is parked in intense sunlight.
_& WARNING
-To reduce the risk of personal injury nev­
er touch the radiator fan .
- The auxiliary electric fan is temperature
controlled and can sw itch on suddenly
even when the engine is not running.
- The a uxiliary radiator fan sw itches on au­
tomatically when the engine coo lant
reaches a certa in temperature and will
continue to ru n until the coolant temper­
ature drops.
Brake fluid
Checking brake fluid level
Fig. 173 En gin e compartment: mark ings on th e brake
fluid rese rvoir